Crank-hanger for bicycles



(No Model.

W. F. HAWES.

CRANK HANGER FOR BIOYOLES.

Patented Apr. 27, 1897.

THE Nomus PETERS ca. WdTo-u'molwuuwnmu n c UNITED STATES PATENT OFFIC\VILBER F. HAW'ES, OF DENVER, COLORADO.

.CRANK-HANGER FOR BICYCLES.

SPECIFICATION forming part of Letters Patent No. 581,395, dated April27, 1897.

Applicati n filed April 14, 1896.

To all whom it may concern:

Be it known that I, WILBER F. HAWES, a citizen of the United States, anda resident of Denver, Arapahoe county, State of 0010- rado, haveinvented certain new and useful Improvements in Crank-Hangers forBicycles; and my preferred manner of carrying out the invention is setforth in the following full, clear, and exact description, terminatingwith claims particularly specifying the novelty.

This invention relates to velocipedes, and more especially to thebearings thereof; and the object of the same is to produce certainimprovements in the bearing for the crankshaft on an ordinarysafety-bicycle.

To this end the invention consists in the specific details ofconstruction hereinafter more fully described and claimed, andasillustrated in the accompanying drawings, wherein Figure 1 is acentral longitudinal section of one form of this improved bearingcomplete. Fig. 2 is an elevation of the right end, and'Fig. 3 anelevation of the left end, thereof. Fig. 4is a cross-section showing theinner end of the left-hand cone. Fig. 5 is a crosssection of the casing,showing the notched ridge with which the lugs on said cone engage. Fig.6 is a section looking toward the inner end of the right-hand cone. Fig.6 is an enlarged sectional detail of the threaded sleeve and cap withthe latter removed. Fig. 7 is a side elevation of the bolt forconnecting the crank-axles, with an end view of the wrench for turningthe same.

In the said drawings the letter T designates the casing, such as usuallycomprises a part of theframework of an ordinary reardrivingsafety-bicycle, which casing has a hollow cylindrical portion for thereception of the entire bearing for the crank-axles. WVithin this casingis located a hollow shaft G, concentric therewith and exteriorlythreaded at its extremities. On one end (here shown as the left) of thisshaft is screwed the cone E, Whose operative face stands outward andwhose vertical inner face is provided with lugs P, adapted when theshaft is in position to engage notches I, cut in an inwardly-projectingridge H, formed on the inner face of the casing T, by which means thecone E is Serial No. 587,493. (No model.)

' prevented from rotation after it (with the shaft G) has been placed inposition. It will be obvious that this cone E might be fixed upon orcast integral with the shaft G, if preferred, as it is not intended foradjustment thereon. Upon the opposite threaded end of the shaft G isscrewed the adjustable cone F, whose operative face stands outward andis preferably provided with openings W for the reception of a suitablespanner-wrench, by means of which it can be turned, and whose radiallyoutward face is also provided with threaded holes K. At a suitable pointin the casing T is cut a rather large opening surrounded by a threadedsleeve j, adapted to be closed by a threaded cap J, and M is a keyadapted to fit within this sleeve and of such size and shape that itsopposite sides rest against the inner wall of the sleeve j. This key isprovided with a projecting tongue or point at near one .end thereof andon its under side, which point is of a size to pass loosely into one ofthe holes K, whereby it serves, in addition to the screw N, as a meansfor locking the cone F in position. The point 'm is of such length thatwhen the key M is raised out of position within the sleeve j the tip ofthe point may be inserted in one of the holes K, whereby after the coneF has been turned as far as possible by means of a spanner-wrench thekey M may be employed to turn it still farther by pushing or pulling it,after which the key is inserted Within the sleeve to hold the cone inadjusted position, as will be clear, the cap J closing the orificethrough the sleeve and preventing the entrance of dust. The casing T is,furthermore, preferably provided with a slot t, through which may bepassed a screw N, whose head is of sufficient size to close the slot andwhose point takes into one of the threaded holes K in the periphery ofthe adjustable cone F, whereby this cone may be further held againstrotation after adjustment, or by means of which alone it may be so held,provided the key M is not employed.

The cranks S-terminate in heads A and B, and preferably cast integraltherewith are the hollow crank-axles O and D, respectively, which arenotched or shouldered at their inner ends so as to engage each otherwhen the cranks S stand opposite, said hollow axles being interiorlythreaded, as will be understood.

The heads A and B are provided with openings or runways for thereception of the balls V, and seated therein are wear-plates O, toreceive the wear of such balls, but obviously these wear-plates may beomitted,if preferred, suitable inlet openings being provided in eitherconstruction for the admission of a lubricant, as will be clear.

The letter R designates the spokes of the sprocket-wheel, and thecrank-head A is preferably provided with ears Q, which are attached byscrews or bolts passing through holes L to said spokes, so that therotation of the cranks produces the revolution of the sprocket, as willbe clear.

After assembling the various parts of this device a double screw U isinserted, the threads at its extremities taking into correspondin gthreads in the interior of the crankaxles G and D, and by turning thisscrew with a screw-driver, as seen in Fig. 1, or with a hollow wrench,as elsewhere shown, the notched or shouldered endsof the crank-axles Oand D will be drawn firmly into engagement, as will be clear. Theadjustment of the movable cone F outward from the center of the casing Tmay then occur until the two series of balls V are tightly clampedwithin their respective runways, so as to prevent too great looseness ofparts.

All portions of this device are of the desired sizes, shapes,proportions, and materials, and considerable change in the specificdetails of construction may be made without departing from the principleof my invention.

That is claimed as new is- 1. In a bicycle-bearing, the combination witha hollow casin g having near one extremity an inwardlyprojecting ridgeprovided with notches; of an interior hollow shaft, a cone carriedthereby and having lugs engaging the said notches, an adjustable conemounted on its opposite extremity, two series of balls, and thecrank-axles having runways for the latter, as and for the purpose setfort-h.

and the crank-axles having runways for the latter, as and for thepurpose set forth.

3. In a bicycle-bearing, the combination with a hollow casing providednear one extremity with a capped opening and adjacent thereto with aslot, a key fitting within said opening and having a point, and a screwwhose head closes the slot and whose shank passes through the same; ofan interior 1101- low shaft having a cone at one end connected with theopposite extremity of the casing, an adjustable cone at the other end ofthe shaft having radial screw-threaded openings for the purpose setforth, two series of balls, and the crank-axles having runways for thelatter, as and for the purpose set forth.

4. In a bicycle-bearing, the combination with a hollow casing having atone extremity an inwardly-projecting ridge provided with notches, aninternal hollow shaft having threads at its opposite ends, acone mountedon one end and provided with lugs engaging said notches, a cone mountedon the opposite end and provided with openings in its oblique face forthe reception of a spanner, and means for holding this cone in adjustedposition; of two series of balls, and the crank-axles having runways forthe latter, as and for the purpose set forth.

In testimony-whereof I have hereunto subscribed my signature on this the11th day of April, A. D. 1896.

\VILBER F. HAIVES.

lVitnesses:

MARY HAMPTON LLOYD, WM. FRANCIS ROBINSON.

